2N BlueTower is the optimal solution for medium-sized companies with a high frequency of calls to mobile networks. This is a GSM / UMTS gateway, which can significantly reduce the cost of telephone calls. Its efficient router is able to find the cheapest connection route and will always use the most favorable direction (SIM-card).
COMTALK delivers DID/DDI numbers & termination in Denmark (but also most of the world) We offer SIP and are also MVNO, which means low cost calls to the Danish Celluar networks